Introduction Tetraphenylporphyrin will be synthesized and metallated with silver acetate. After purification and NMR and UV-visible spectra was taking for the original porphyrin synthesized and the silver porphyrin. From this data obtained we will talk about silver’s effect on porphyrin. Theory Porphyrin is important to study because it plays keys roles in biological process; they are responsible for giving plants and blood their colors green and red respectively. Porphyrins have the iron chelate
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References: ’ (Zhuravlev and Kiselev‚ 1970) Figure 10.12. Differential enthalpies of adsorption of argon and nitrogen on a mesoporous silical gel: effect of outgassing at different temperatures (Rouqueml er al.‚ 1979b).
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matches the unknown samples of which there was two (X and Y) using two Silica Gel plates and placing them in different mobile phases. TLC uses both a stationary phase and mobile phase to separate any substances on the TLC plate. This is determined on how well a compound will adsorb to the stationary phase compared to how well the compound dissolves in the mobile phase1. In this experiment‚ the stationary phase was Silica Gel and the mobile phase for Solvent System A (ethylacetate:methanol:strong
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Optical Fiber and its Applications Index 1. Aim 2. Important Terms 3. Optical Fibers 4. Applications 5. Principle Of Operation 6. Mechanism of Attenuation 7. Manufacturing 8. Practical Issue 9. Electronically Based Project 10. Bibliography Aim To Study the Optical Fibre Cable Principle and its Applications. Important Terms v Optical Fiber: An optical fiber (or fibre) is a glass or plastic fiber that carries light along its length. Fiber optics is the
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when solar energy is used for regeneration. This paper presents the outcome of a solid desiccant evaporative cooling system (DEC) that can be used in moderate humid climates by coupling desiccant dehumidification equipment to evaporative coolers. Silica gel is used as desiccant in the present system. The rates of cooling and dehumidification were assessed under the effects of variables such as air temperature and humidity. The constructed solid desiccant cooling system could reduce the outlet air temperature
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Investigating Aspirin Aims Synthesize my own aspirin Analyse the purity of my aspirin samples (aspirin and recrystallized aspirin) compared to commercial aspirin by use of analysing melting points‚ TLC plates and colorimetry tests Investigate how pH effects the rate of hydrolysis of aspirin Background theory Making my own sample of Salicylic acid (to then be converted into Aspirin) Salicylic acid (2-Hydroxybenzoic acid) can be made by hydrolysing methyl 2-hydroxybenzoate. Oil
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into the atrial wall with three clockwise screw motions. Prior to this we had obtained satisfactory pacing numbers‚ threshold numbers‚ and sensitivity numbers with the ventricular wire. The permanent leads were affixed to the generator‚ after silica gel applied‚ screw caps applied‚ excess wire coiled behind the generator‚ all housed in the pocket‚ wound closed with 2-0 Vicryl‚ subcutaneous and 3-0 nylon on the skin. Satisfactory pacing was obtained‚ and the patient returned to his room
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performing a method of chromatography. Thin layer chromatography (TLC) was performed by using a mobile phase and a stationary phase. The mobile phase was a nonpolar solvent composed of ethanol and ethyl acetate. The solid stationary phase was coated with silica gel‚ which is very polar. The amino acids were spotted onto two TLC plates; the plates were then placed in a chamber which contained the mobile phase. The plates were sprayed with 0.1% Ninhydrin and placed in an oven. The distance of the traveled spots
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School of Chemistry University of KwaZulu-Natal Westville Campus Chemistry 220 Organic Chemistry 2012 LABORATORY MANUAL It is a legal requirement that are worn in this room at all times. Sunglasses (normal or prescription) are NOT to be worn as a substitute for safety glasses. Prescription glasses (except sunglasses) are acceptable PROVIDED THEY COVER THE EYES COMPLETELY. Some types of contact lens should not be worn in the laboratory. Check with your lens supplier. All shoes MUST be
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Geopolymer From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search Geopolymers are new materials for fire- and heat-resistant coatings and adhesives‚ medicinal applications‚ high-temperature ceramics‚ new binders for fire-resistant fiber composites‚ toxic and radioactive waste encapsulation and new cements for concrete. The properties and uses of geopolymers are being explored in many scientific and industrial disciplines: modern inorganic chemistry‚ physical chemistry‚ colloid chemistry
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